EP0583899A1 - Méthode et dispositif pour alimenter des pièces - Google Patents

Méthode et dispositif pour alimenter des pièces Download PDF

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Publication number
EP0583899A1
EP0583899A1 EP93305952A EP93305952A EP0583899A1 EP 0583899 A1 EP0583899 A1 EP 0583899A1 EP 93305952 A EP93305952 A EP 93305952A EP 93305952 A EP93305952 A EP 93305952A EP 0583899 A1 EP0583899 A1 EP 0583899A1
Authority
EP
European Patent Office
Prior art keywords
parts
conveyer belt
detecting means
speed
separating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93305952A
Other languages
German (de)
English (en)
Other versions
EP0583899B1 (fr
Inventor
Michio Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YKK Corp
Original Assignee
YKK Corp
Yoshida Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by YKK Corp, Yoshida Kogyo KK filed Critical YKK Corp
Publication of EP0583899A1 publication Critical patent/EP0583899A1/fr
Application granted granted Critical
Publication of EP0583899B1 publication Critical patent/EP0583899B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/22—Devices influencing the relative position or the attitude of articles during transit by conveyors
    • B65G47/26—Devices influencing the relative position or the attitude of articles during transit by conveyors arranging the articles, e.g. varying spacing between individual articles
    • B65G47/30—Devices influencing the relative position or the attitude of articles during transit by conveyors arranging the articles, e.g. varying spacing between individual articles during transit by a series of conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/22—Devices influencing the relative position or the attitude of articles during transit by conveyors
    • B65G47/26—Devices influencing the relative position or the attitude of articles during transit by conveyors arranging the articles, e.g. varying spacing between individual articles
    • B65G47/30—Devices influencing the relative position or the attitude of articles during transit by conveyors arranging the articles, e.g. varying spacing between individual articles during transit by a series of conveyors
    • B65G47/31—Devices influencing the relative position or the attitude of articles during transit by conveyors arranging the articles, e.g. varying spacing between individual articles during transit by a series of conveyors by varying the relative speeds of the conveyors forming the series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
    • B65G2203/04—Detection means
    • B65G2203/042—Sensors

Definitions

  • This invention relates to a parts supplying apparatus for automatically feeding one or more kinds of parts, such as different shapes of slider pull tabs, end stops and coupling elements for slide fasteners, or different shapes of button components, which are accomodated in a scattered and mixed fashion in a parts feed unit, successively to a subsequent station while they are separated individually, and for separating the parts in sorts.
  • parts such as different shapes of slider pull tabs, end stops and coupling elements for slide fasteners, or different shapes of button components
  • the parts feeder has a basic structure in which a rotary disk is concentrically mounted on a bottom of a bottom-closed cylindrical tube fixed to a frame and is intermittently rotatable.
  • the fixed cylindrical tube has an inside diameter slightly larger than that of the rotary disk to define a parts guide gap along the inner circumferential surface of the fixed cylindrical tube.
  • a parts guide having an upper slant guide surface extends in the direction of rotation of the rotary disk from the bottom of the fixed cylindrical tube to its parts outlet port.
  • a method of supplying parts by repeating in order the following steps: automatically feeding one or more kinds of plenty scattered parts successively out of a feed unit while guiding the individual parts successively along a guide; conveying the successively fed out parts at a high speed by a conveyer belt; shifting the conveying belt down to a low speed automatically when first parts detecting means detects that a leading end of the successive parts being conveyed at the high speed has arrived at a forward end of the conveyer belt; and temporarily stopping the conveyer belt automatically when second parts detecting means detects that the leading end of the successive parts being conveyed has fallen from a turn end of the conveyer belt as shifted down to the low speed.
  • a parts supplying apparatus equipped with an automatic parts feed unit for feeding one or more kinds of plenty scattered parts successively out of the automatic parts feed unit while guiding the individual parts successively along a guide and a parts separating conveyer belt situated adjacent to a parts outlet port of the automatic parts feed unit
  • the apparatus includes first and second parts detecting means situated on a conveying surface of a forward end of the separating conveyer belt and on a turning end of the separating conveyer belt, respectively, and speed control means for shifting a driving speed of the separating conveyer belt upon receipt of a detection signal of each of the first and second parts detecting means and wherein the speed control means drives the conveyer belt at a high speed, until a leading end of the successive parts being conveyed is detected by the first parts detecting means, and shifts down the conveyer belt to a low speed upon such detection and temporarily stops driving the conveyer belt when the second parts detecting means detects that the leading end part has arrived at the turning end of the conveyer belt.
  • the parts outlet port of the automatic parts feed unit is provided with a pin retractably projecting from its parts outlet surface, the pin being capable of assuming a projected posture while the parts separating conveyer belt is driven at the low speed.
  • the parts outlet port of the automatic parts feed unit may be provided with a pin retractably projecting from its parts outlet surface, the pin being capable of assuming alternately a projected posture and a retracted posture at predetermined time intervals.
  • one or more kinds of parts are supplied from known parts manufacturing units onto a rotary disk, which is mounted on the bottom of the parts feed unit and is intermittently driven for rotation in one direction, simultaneously and at random.
  • the plenty parts randomly supplied onto rotary disk will gather around the inner wall surface of the fixed cylindrical tube and will be moved circumferentially on the rotary disk in response to the intermittent rotation of the rotary disk. During this rotation, some of the parts will climb the guide, which extends spirally from the bottom to the upper end of the fixed cylindrical tube, as pushed all the way up to the parts outlet port along the slant guide surface by the succeeding parts. At the same time, some of the parts will fall onto the rotary disk from the guide, depending on the position of center of gravity of the individual part.
  • the parts arrived at the parts outlet port will then be successively transferred onto the conveyer belt, which runs at a high speed, via a transfer tray.
  • the "high speed” means a speed higher than the speed at which the parts are fed from the parts feed unit. This speed difference will create a desired gap between the individual parts fed from the parts feed unit and those transferred to and conveyed by the conveyer belt.
  • the first parts detecting means Upon detection of a leading one of the parts, which are conveyed by the conveyer belt at the high speed, at the forward end of the belt, the first parts detecting means issues a detection signal to the belt speed control unit where the conveyer belt is shifted to a low speed, whereupon the belt will be driven to run slowly. With continued slow running, the leading part on the belt will arrive at the turning end of the belt slowly and will then fall from the belt end by gravity.
  • the second part detecting means When it has detected this falling, the second part detecting means will issue a detecting signal to the belt speed control unit to temporarily stop the belt.
  • This stopping should be set so as to take place when the succeeding parts reach a position immediately short of the belt end. Using a timer or the like, this stopping should also be set so as to continue for an adequate period of time during which the leading end part will arrive at the next station.
  • the conveyer belt will restart running at the high speed, and then the foregoing procedure will be repeated so that the parts being fed from the parts feed unit, as they are in contact with one another, will be separated reliably, while being conveyed by the conveyer belt, and will then be supplied successively to the next station.
  • the parts sorting unit is situated contiguously to the conveyer belt, various kinds of parts being transferred from the belt as separated individually should be separated in sorts inthe parts sorting unit and will then be discharged to the subsequent station.
  • FIGS. 1 to 3 show a slide fastener slider pull tab supplying apparatus according to one preferred embodiment of the invention.
  • the apparatus is equipped with a parts feeder 10, which is an automatic parts feed unit having the conventional structure, and a parts separating conveyer unit 20, which constitutes an inventive feature of this invention.
  • the parts feeder 10 includes a fixed cylindrical tube 11 having an inverted frustoconical shape, and a rotary disk 12 constituting the bottom of the cylindrical tube 11.
  • a parts guide 13 On the inner circumferential wall surface of the fixed cylindrical tube 11, a parts guide 13 extends spirally from the bottom to the upper end of the tube 11.
  • the rotary disk 12 is intermittently rotated, in a direction indicated by an arrow in FIG. 2, by a non-illustrated drive source via a known intermittent drive mechanism.
  • a transfer tray 31 is situated for transferring the parts, which have been fed from the parts feeder 10, successively to the parts separating conveyer unit 20.
  • a pin 32 to be activated by a non-illustrated cylinder is mounted on the parts guide 13 at a position adjacent to the entrance of the transfer tray 31, a pin 32 to be activated by a non-illustrated cylinder is mounted.
  • a below-described conveyer belt 26 of the parts separating conveyer unit 20 is driven at a low speed, the pin 32 will project upwardly from the guide surface of the parts guide 13.
  • the parts feeder 10 should by no means be limited to the illustrated example.
  • the parts separating conveyer unit 20, which constitutes a characteristic feature of this invention, includes a belt drive portion 21 and a belt support portion 22.
  • a variable speed motor 23 is mounted, and a belt drive pulley 24 is attached to the output shaft of the motor 23 via non-illustrated reduction gears.
  • the changeover of the speed of the variable speed motor 23 is controlled by a non-illustrated control unit.
  • the belt support portion 22 is mounted horizontally on the upper section of the belt drive portion 21 and has a pair of belt drive rollers 25, 25 at their longitudinal front and rear ends, respectively.
  • a conveyer belt 26 is wound around the belt drive rollers 25, 25.
  • a V belt 27 wound around the belt drive pulley 24 is wound around one side ends of respective shafts of the belt drive rollers 25, 25 via a pair of tension rollers 28, 28.
  • a first parts detector 29 is situated at the front end of the conveying surface of the conveyer belt 26. Upon detection of the passage of a part, the first parts detector 29 issues a signal to the control unit. This control unit then shifts the variable speed motor 23 from the high-speed driving to the low-speed driving, and at the same time, causes the pin 32 to project from the guide surface of the parts guide 13 to thereby prevent the succeeding parts from being transferred to the parts separating conveyer unit 20. During this time, superfluous parts fall onto the rotary disk 12 of the parts feeder 10 by gravity as they are pushed out on the guide surface, so that a virtually constant number of parts will stay on the guide surface always.
  • a photoelectric sensor is used for the first parts detector 29.
  • a second parts detector 30 is situated at a lower portion of the turning end of the conveyer belt 26. Upon detection of the parts falling by gravity from the front end of the conveyer belt 26, the second parts detector 30 activates the control unit to stop driving the conveyer belt 26.
  • the second parts detector 30 also is a photoelectric sensor, an alternative type sensor may be used.
  • the parts separating conveyer unit 20 is situated adjacent to a transfer tray 31, which is mounted at the parts outlet port of the parts feeder 10, for conveying the parts, which slide down successively onto the conveyer belt 26 along a slant surface of the transfer tray 31, forwardly at a predetermined high speed exceeding the parts discharging speed of the parts feeder 10. Consequently, the distance between the successive parts sliding down along the slant surface of the transfer tray 31 to the conveyer belt 26 will increase on the conveyer belt 26 by an increment corresponding to the speed difference.
  • the pin 32 is retracted in the guide surface of the parts feeder 10 to allow the successive parts to move onto the transfer tray 31.
  • the first parts detector 29 Upon arrival of a leading one of the successive parts, which are being conveyed at the high speed by the conveyer belt 26, the first parts detector 29 issues a detection signal to the non-illustrated control unit of the belt drive portion 21 which then controls so as to shift the variable speed motor 23 from the high-speed driving to the low-speed driving and, at the same time, to cause the pin 32 to project from the guide surface so that the succeeding parts fed onto the parts guide 13 are temporarily prevented from being transferred to the parts separating conveyer unit 20.
  • the parts having passed the first parts detector 29 will be conveyed slowly toward the turning end of the conveyer belt 26 and will then falls by gravity upon arrival at the turning end. Having detected this falling, the second parts detector 30 issues a signal to the non-illustrated control unit to stop the variable speed motor 23.
  • variable speed motor 23 By the stopping of the variable speed motor 23, the succeeding parts will stay on the conveyer belt 26 and hence will be completely separated from the leading end part. After the lapse of a predetermined period of time since then, the variable speed motor 23 will restart the high-speed driving and, at the same time, the pin 32 will be retracted in the guide surface of the parts feeder 10 so that the succeeding parts staying on the guide surface of the parts feeder 10 can slide down one after another onto the transfer tray 31 for transfer to the conveyer belt 26.
  • the individual parts are conveyed, as completely separated, to a non-illustrated subsequent station such as a predetermined section of a slider assembling station where the individual parts are assembled into complete slider bodies.
  • the pin 32 is projected from the guide surface during the low-speed running of the conveyer belt 26 and is retracted in the guide surface during the high-speed running of the conveyer belt 26.
  • the pin 32 may be controlled so as to assume a projected posture and a retracted posture alternately at a desired time difference.
  • the pin 32 should be projected from the guide surface intermittently in timed relation with the intermittent feed of successive parts so that every other parts will be pushed up by the pin 32 to fall onto the bottom of the parts feeder 10.
  • FIGS. 1 to 3 show another embodiment in which a plurality of kinds of parts, e.g., mixed different shapes of slider pull tabs are successively fed by the same parts feeder 10 and are then conveyed as separated individually and reliably, whereupon the individual parts are sorted in parts bins, each of which receives the same kind of parts.
  • a plurality of kinds of parts e.g., mixed different shapes of slider pull tabs
  • a parts sorting unit 34 is situated adjacent to the parts separating conveyer unit 20 of FIGS. 1 to 3 via a second transfer tray 33.
  • the second transfer tray 33 is a forwardly downwardly sloping gutter-shape tray, under which a parts receiving table 36 supported by a frame 35a of a bed 35, reciprocatingly slidable worked by means of a cylinder 37 is situated.
  • a shutter 38 vertically movable worked by means of a cylinder 38a is situated.
  • the parts sorting unit 34 includes a circular base 39 intermittently turnable at a predetermined angular pitch by a suitable intermittent drive means, a parts identifying unit 40 situated adjacent to the parts inlet port of the circular base 39 and utilizing the image processing technology, a number of fixed discharge trays 41 arranged around the circular base 39 except at the parts inlet port, a number of parts bins 42 situated one each under the discharge trays 41, and a number of non-illustrated parts pushing rods reciprocatingly movable radially on the upper surface of the circular base 39.
  • the parts identifying unit 40 identifies the type of a part (P) by photographing the part (P) by a camera and then electronically processing the image. Based on this result of identification, the non-illustrated control unit activates the intermittent drive means to turn the circular base 39 through a predetermined angle so that the same kinds of parts (P) are positioned in front of a desired discharge tray 41.
  • the separated parts (P) thus conveyed by the conveyer belt 26 slide down along the second transfer tray 33 and then fall onto the upper surface of the parts receiving table 36 at forwarded porition. Then the parts receiving table 36 is moved backwardly so that the parts (P) on the parts receiving table 36 are transferred to a guide plate 43 that is mounted under the parts receiving table 36 in the for-warded position and is horizontally aligned with the circular base 39 of the parts sorting unit 34.
  • the shutter 38 which is situated at the end of the forward stroke of the parts receiving table 36, assumes a projected posture to prevent the parts (P) from being supplied to the parts sorting unit 34 unnecessarily.
  • the shutter 38 When the parts (P) have been transferred to the guide plate 43, the shutter 38 will be retracted downwardly and, at the same time, the parts receiving table 36 is moved forwardly to transfer the parts (P) onto the circular base 39 of the parts sorting unit 34. Then the circular base 39 is rotated, in a direction indicated by an arrow in FIG. 5, to temporarily move the parts to the parts identifying unit 40 where the type of the individual part is identified.
  • the same kind of parts (p) will be positioned in front of a desired discharge tray 41, whereupon the non-illustrated parts pushing rod will be activated to push these parts (P) onto the discharge tray 41 so that the parts (P) are received in the parts bin.
  • reference numeral 44 designates a hopper for supplying parts (P) situated above the parts feeder 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
  • Feeding Of Articles To Conveyors (AREA)
  • Control Of Conveyors (AREA)
  • Branching, Merging, And Special Transfer Between Conveyors (AREA)
EP93305952A 1992-08-17 1993-07-28 Méthode et dispositif pour alimenter des pièces Expired - Lifetime EP0583899B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4217890A JPH0664736A (ja) 1992-08-17 1992-08-17 部品類供給方法及び装置
JP217890/92 1992-08-17

Publications (2)

Publication Number Publication Date
EP0583899A1 true EP0583899A1 (fr) 1994-02-23
EP0583899B1 EP0583899B1 (fr) 1997-01-02

Family

ID=16711373

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93305952A Expired - Lifetime EP0583899B1 (fr) 1992-08-17 1993-07-28 Méthode et dispositif pour alimenter des pièces

Country Status (10)

Country Link
US (1) US5322155A (fr)
EP (1) EP0583899B1 (fr)
JP (1) JPH0664736A (fr)
KR (1) KR0141350B1 (fr)
CA (1) CA2101477C (fr)
DE (1) DE69307049T2 (fr)
ES (1) ES2096211T3 (fr)
HK (1) HK128397A (fr)
SG (1) SG43302A1 (fr)
TW (1) TW249794B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015132335A1 (fr) * 2014-03-05 2015-09-11 Bühler AG Machine de séparation d'éléments
CN107900480A (zh) * 2017-12-06 2018-04-13 浙江和胜磁业有限公司 一种接线板三芯线触头自动焊装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001106332A (ja) * 1999-10-11 2001-04-17 Yoshitaka Aoyama 異常プロジェクションナットの排出装置
JP4061085B2 (ja) 2002-02-07 2008-03-12 Ｙｋｋ株式会社 部品整送装置
KR101043037B1 (ko) * 2009-10-09 2011-06-21 세크론 주식회사 전자 부품 선별 장치 및 방법
CN102951439A (zh) * 2012-10-08 2013-03-06 梁添贵 一种高速上料机构
CN112108387B (zh) * 2020-09-09 2022-05-13 溆浦易锋精细瓷业有限责任公司 一种以陶瓷为原料的精细打火机配件专用质检设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956812A (en) * 1973-04-18 1976-05-18 Yoshida Kogyo Kabushiki Kaisha Apparatus for feeding slide fastener parts
FR2492783A1 (fr) * 1980-10-27 1982-04-30 Windmoeller & Hoelscher Bande convoyeuse a commande intermittente
DE3118464A1 (de) * 1981-05-09 1982-11-25 Stierlen-Maquet Ag, 7550 Rastatt "einrichtung zum taktweisen transport von gegenstaenden"
EP0213417A1 (fr) * 1985-08-05 1987-03-11 Walter Sticht Procédé et dispositif pour séparer une par une des pièces de montage
FR2607482A1 (fr) * 1986-04-17 1988-06-03 Arci Dispositif permettant de distribuer un par un des objets de taille et de forme irregulieres
EP0310411A1 (fr) * 1987-10-01 1989-04-05 Logan Fenamec (Uk) Limited Procédé et appareil pour séparer des articles transportés par un système de transport

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204765A (en) * 1963-12-30 1965-09-07 L D Adcox Sorting machine for potatoes and the like
GB1412700A (en) * 1973-06-04 1975-11-05 Crisplant As Method and apparatus for providing spacing between articles
US3944049A (en) * 1973-07-30 1976-03-16 Graybill Wilbur H Conveyor system and method for assuring a continual backlog
CH616899A5 (fr) * 1977-07-13 1980-04-30 Sig Schweiz Industrieges
JPS6251508A (ja) * 1985-08-29 1987-03-06 Hitachi Electronics Eng Co Ltd デバイスの個別分離機構
NL8801525A (nl) * 1988-06-15 1990-01-02 Werner & Pfleiderer Haton Bv Inrichting voor het overbrengen van voorwerpen vanaf een afleverinrichting naar een opneeminrichting.
FR2666315B1 (fr) * 1990-09-04 1992-12-11 France Etat Dispositif pour controler et regulariser l'espacement de colis, paquets ou objets analogues, notamment de colis postaux.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956812A (en) * 1973-04-18 1976-05-18 Yoshida Kogyo Kabushiki Kaisha Apparatus for feeding slide fastener parts
FR2492783A1 (fr) * 1980-10-27 1982-04-30 Windmoeller & Hoelscher Bande convoyeuse a commande intermittente
DE3118464A1 (de) * 1981-05-09 1982-11-25 Stierlen-Maquet Ag, 7550 Rastatt "einrichtung zum taktweisen transport von gegenstaenden"
EP0213417A1 (fr) * 1985-08-05 1987-03-11 Walter Sticht Procédé et dispositif pour séparer une par une des pièces de montage
FR2607482A1 (fr) * 1986-04-17 1988-06-03 Arci Dispositif permettant de distribuer un par un des objets de taille et de forme irregulieres
EP0310411A1 (fr) * 1987-10-01 1989-04-05 Logan Fenamec (Uk) Limited Procédé et appareil pour séparer des articles transportés par un système de transport

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015132335A1 (fr) * 2014-03-05 2015-09-11 Bühler AG Machine de séparation d'éléments
US10071865B2 (en) 2014-03-05 2018-09-11 Bühler AG Machine for separating elements
CN107900480A (zh) * 2017-12-06 2018-04-13 浙江和胜磁业有限公司 一种接线板三芯线触头自动焊装置

Also Published As

Publication number Publication date
EP0583899B1 (fr) 1997-01-02
ES2096211T3 (es) 1997-03-01
KR0141350B1 (ko) 1998-07-15
US5322155A (en) 1994-06-21
KR940003507A (ko) 1994-03-12
CA2101477C (fr) 1996-12-10
JPH0664736A (ja) 1994-03-08
DE69307049D1 (de) 1997-02-13
HK128397A (en) 1997-09-19
SG43302A1 (en) 1997-10-17
TW249794B (fr) 1995-06-21
CA2101477A1 (fr) 1994-02-18
DE69307049T2 (de) 1997-07-03

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